Using JQuery to control drop-down lists
//遍历option和添加、移除option function changeShipMethod(shipping){ var len = $("select[@name=ISHIPTYPE] option").length if(shipping.value != "CA"){ $("select[@name=ISHIPTYPE] option").each(function(){ if($(this).val() == 111){ $(this).remove(); } }); }else{ $("<option value='111'>UPS Ground</option>").appendTo($("select[@name=ISHIPTYPE]")); } } //取得下拉选单的选取值 $(#testSelect option:selected').text(); 或$("#testSelect").find('option:selected').text(); 或$("#testSelect").val();
///////////////////////////////// /////////////////////////////////////
If you have a bad memory, you can save it:
##1, drop-down box:
var cc1 = $(".formc select[@name='country'] option[@selected]").text(); //得到下拉菜单的选中项的文本(注意中间有空格) var cc2 = $('.formc select[@name="country"]').val(); //得到下拉菜单的选中项的值 var cc3 = $('.formc select[@name="country"]').attr("id"); //得到下拉菜单的选中项的ID属性值 $("#select").empty();//清空下拉框//$("#select").html(''); $("<option value='1'>1111</option>").appendTo("#select")//添加下拉框的option
A little explanation:
##1.select[@name='country'] option[@selected] means it has the name attribute,
And the attribute value is the option element with the selected attribute in the select element of 'country';
It can be seen that there are The one starting with @ means that what follows is an attribute.
2, radio button:
$("input[@type=radio][@checked]").val(); //得到单选框的选中项的值(注意中间没有空格) $("input[@type=radio][@value=2]").attr("checked",'checked'); //设置单选框value=2的为选中状态.(注意中间没有空格)
3, Check box:
##$("input[@type=checkbox][@checked]").val(); //得到复选框的选中的第一项的值 $("input[@type=checkbox][@checked]").each(function(){ //由于复选框一般选中的是多个,所以可以循环输出 alert($(this).val()); }); $("#chk1").attr("checked",'');//不打勾 $("#chk2").attr("checked",true);//打勾 if($("#chk1").attr('checked')==undefined){} //判断是否已经打勾
<script src="jquery-1.2.1.js" type="text/javascript"></script> <script language="javascript" type="text/javascript"> $(document).ready(function(){ $("#selectTest").change(function() { //alert("Hello"); //alert($("#selectTest").attr("name")); //$("a").attr("href","xx.html"); //window.location.href="xx.html"; //alert($("#selectTest").val()); alert($("#selectTest option[@selected]").text()); $("#selectTest").attr("value", "2"); }); }); </script> <a href="#">aaass</a> <!--下拉框--> <select id="selectTest" name="selectTest"> <option value="1">11</option> <option value="2">22</option> <option value="3">33</option> <option value="4">44</option> <option value="5">55</option> <option value="6">66</option> </select> jquery radio取值,checkbox取值,select取值,radio选中,checkbox选中,select选中,及其相关获取一组radio被选中项的值 var item = $('input[@name=items][@checked]').val(); 获取select被选中项的文本 var item = $("select[@name=items] option[@selected]").text(); select下拉框的第二个元素为当前选中值 $('#select_id')[0].selectedIndex = 1; radio单选组的第二个元素为当前选中值 $('input[@name=items]').get(1).checked = true; 获取值: 文本框,文本区域:$("#txt").attr("value"); 多选框checkbox:$("#checkbox_id").attr("value"); 单选组radio: $("input[@type=radio][@checked]").val(); 下拉框select: $('#sel').val(); 控制表单元素: 文本框,文本区域:$("#txt").attr("value",'');//清空内容 $("#txt").attr("value",'11');//填充内容 多选框checkbox: $("#chk1").attr("checked",'');//不打勾 $("#chk2").attr("checked",true);//打勾 if($("#chk1").attr('checked')==undefined) //判断是否已经打勾 单选组radio: $("input[@type=radio]").attr("checked",'2');//设置value=2的项目为当前选中项 下拉框select: $("#sel").attr("value",'-sel3');//设置value=-sel3的项目为当前选中项 $("<optionvalue='1'>1111</option><optionvalue='2'> 2222</option>").appendTo("#sel")//添加下拉框的option $("#sel").empty();//清空下拉框 获取一组radio被选中项的值 var item = $('input[@name=items][@checked]').val(); 获取select被选中项的文本 var item = $("select[@name=items] option[@selected]").text(); select下拉框的第二个元素为当前选中值 $('#select_id')[0].selectedIndex = 1; radio单选组的第二个元素为当前选中值 $('input[@name=items]').get(1).checked = true; 获取值: 文本框,文本区域:$("#txt").attr("value"); 多选框checkbox:$("#checkbox_id").attr("value"); 单选组radio: $("input[@type=radio][@checked]").val(); 下拉框select: $('#sel').val(); 控制表单元素: 文本框,文本区域:$("#txt").attr("value",'');//清空内容 $("#txt").attr("value",'11');//填充内容 多选框checkbox: $("#chk1").attr("checked",'');//不打勾 $("#chk2").attr("checked",true);//打勾 if($("#chk1").attr('checked')==undefined) //判断是否已经打勾 单选组radio: $("input[@type=radio]").attr("checked",'2');//设置value=2的项目为当前选中项 下拉框select: $("#sel").attr("value",'-sel3');//设置value=-sel3的项目为当前选中项 $("<option value='1'>1111</option><option value='2'>2222</option>").appendTo("#sel")//添加下拉框的option $("#sel").empty();//清空下拉框
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